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( o Model.)

J. B. ALLPR'EE.

FLOUR BOLT.

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UNiTn rams ATENT FFICE.

JAMES B. ALLFREE, OF CUMBERLAND, MARYLAND, ASSIGNOR OF ONE-HALF TO ROBERT SHRIVER AND HARRISON S\VARTZ\VELDER, BOTH OF SAME PLACE.

SPECIFICATION forming part of Letters Patent No. 313,152, dated March 3, 1885.

Application filed September 12, 1884.

T at whom it may concern.-

Be it known that I, J AMES B. ALLFREE, a citizen of the United States, residing at Gumberland, Maryland, have invented new and useful Improvements in Flour-Bolts, of which the following is a specification.

My invention relates to certain new and useful improvements in centrifugal flour-bolts.

The object of my invention is to remedy IO certain defects in the present construction of bolts by providing a reel so constructed that any desired portion of the bolting cloth may be removed for the purpose of affording access to the interior of the reel to make re- I 5 pairs, &c., or for the purpose of substituting a new piece of cloth for one which may have be come worn orinjured. The object of the 1nventiou is further to provide asimple and economical means of carrying the material up from the bottom of the reel and discharging it in a manner to insure it to be thrown against a greater area of bolting-cloth than has been possible heretofore; and, further, the ObJBCtS I have in view are to provide an arrangement of beater and reel conducing to the more perfeet bolting of the flour, and also to provide means for holding the cloth in such position relative to the beaters which throw the material upon it as to present the interstices of the 0 cloth in a position most conducive to the passage of the particles.

With these objects in view my invention consists of a reel in which the bolting-clothis madein sections and clamped to the reel-frame 3 5 in a manner to render them easily removable, in which is incorporated a simple means for carrying the material from the bottom of the bolt and discharging it in a manner to be thrown against a greater portion of the surface of the bolting-cloth, and, further, in various details of construction of the means for securing the cloth sections detachably in place and retaining the cloth in a position best adapted for the passage of the flour through its meshes, all

5 substantially as hereinafter set forth andspecifically claimed.

In order that those skilled in the art may know how to construct my improved reel, I will now proceed to minutely describe the same in connection with the accompanying drawings, in which- (No model.)

[ Figure l is a plan view of the reel, with a more perfectly show the interior disposition of parts. Fig. 2 is a cross-section, and Fig. 3 is adetail view of the means for securing the cloth to the ribs and for elevating the chop.

In these drawings, A represents the outer casing of the machine, made air-tightin order to retain the bolted flour, and provided with an outlet-spout at its lower end through which the material passes into a suitable receptacle be- E represents the frame upon which the cloth is stretched. This frame consists of two heads, 0, preferably of metal, having tubular journals,which are mounted in suitable bearings in the sides of the main casing, and through which passes the central shaft, D. The two heads 0 are connected at their peripheries by means of ribs E upon which the cloth is stretched. These ribs are preferably made of metal.

The cloth used in my device is preferably -made in sections of a width equal to the distance between the ribs, and these sections are secured to the ribs by clamps, the bindingscrews of which are upon the outer surfaces of the bolt for convenience in removing the sections for thepurpose of replacing them by new cloth, or for the purpose of gaining access to the interior of the bolt. The preferred means of securing the cloth to the ribs is by the clamp shown in Fig. 3. In this manner of securing the cloth the edges thereof are provided with a cord which is secured in place by folding the cloth back upon itself and confining the cord in the loop thus formed, or by means of a supspace between the edges of the confining-strips and the side of the channels in the ribs for the double thickness of boltingcloth, but not sufficient space for the passage of the corded end.

plemental piece which is doubled, the cord portion of the inclosing-casing removed to i cloth may be readily removed or tightened by simply tightening or loosening the screw bolts.

The strips ofbolting-cloth are stretched from the top of one rib-to the bottom of the other, and in order to hold it in a position to allow the passage of the particles through the meshes, I provide aseries of thin metal stretchers, e, which are curved and extend from the bottom of one rib to the top of the adjacent one and hold the cloth, which is stretched over them in such relation to the internallyarranged heaters as to present the meshes in line coincident with the direction in which the material is thrown by the beaters.

It is desirable that as great a part of the surface of the cloth as possible be in use during the operation of the bolt, in order that the bolting be accomplished to the full capacity of the machine. Heretofore only that part of the cloth against which the material is thrown by the heaters near the bottom of the reel has been utilized in the majority of machines. In my bolt the material is carried up and discharged upon the heaters during nearly the whole of the revolution of the reel, and thus a greater part of the sufaee is utilized-for bolting purposes. The preferred means of accompl ishing this elevating of the material is by making the ribs upon which the cloth isstretched with a channel running from end to end, which catches up the material from the lower part to where it is carried by gravity, and lifts it up as the reel revolves, and gradus-tlly gives it off upon the beater by which it is thrown against the cloth. Thus it will be seen that the top and off side is utilized and the bolt rendered capable of accomplishing much more than has been possible in bolts, as heretofore constructed.

The beaters are a series of strips of wood secured to the shaft D by any suitable intermediate connection. The shaft D bearing the beaters, and the tubularjournals of the reel are so geared as to revolve in the same direction From the foregoingitwillbe apparent thatthe I and to give the former a much more rapid revolution than the latter.

Having thus described my invention, what I claim is 1. in a flour-bolt, the combination of the horizontal ribs and the cloth sections stretched from the upper edge of one rib to the lower edge of the adjacent rib, the said ribs being provided with grooves on their inclosed faces, for the purpose set forth.

2. A flour-bolteomprising the ribs having the external grooves and the cloth stretched upon said ribs from the top of one to the bottom of the adjacent rib, in combination with an adjustable clamp for retaining the edges of the cloth sections in the said groove, substantially as described.

In a flour-bolt, the combination of the cloth sections, the rib E, and means for fastening the cloth, the rib E having the internal channels for elevating the material to be bolted, and the outer channels in which the cloth sections are confined.

a. "he coi'nbination of the ribs having the outer channel, and the cloth sections having corded edges, the said ribs being provided with screwthreaded holes, and the confining-strips extending parallel with the rib contained in the said outer groove and holding the edge of the cloth sections.

A centrifugal reel comprising the ribs, the cloth sections attached thereto and extending from the upper edge of one rib to the lower edge of the adjacent rib, and the stretchers whereby the meshes of the cloth are held in a position best adapted for the passage of the liour, in combination with internally-arranged heaters. y

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses. 4

JAMES B. ALLFBEE. Witnesses:

Rona. Srrnrvnn, 1 M. OFFUTT. 

